Objective To study the major chemical constituents of the rhizomes of C. dahurica. Methods Using silica gel，RP-18，Sephadex LH-20 and HPLC to isolate and purify compounds. The structures of isolated compounds were identified by extensive spectroscopic methods，including MS，NMR，and etc. Results Ten known compounds，ferulic acid（1），methyl-ferulic acid（2），3-methoxyl-4-ethyoxyl-phenylpropionic acid（3），peucenin（4），cimigenol（5），cimigenol-3-one（6），25-O- methyl-cimigenol（7），25-O-acetyl-cimigenol（8），25-dehydrocimigenol（9），cimigenol-3-O-β-D-xyloside（10）were isolated and identified. Conclusion Compounds 2，3，4 were isolated from C. dahurica for the first time.